Trimble Access 2018 will only work with the TSC7, T10 and some higher spec third party devices. TSC3s, Yumas, TCUs and Slates are not supported. These older controllers simply don't have enough processor power to run the new UI.

You won't be able to transfer jobs between 2017 and 2018 so users will need to use jxl file. This won't give you raw observations, however it will give you points, coordinate system and site calibrations. If a customer wants to have the same version of TA on both a TSC3 and TSC7, then they can install 2017.20 on both of them.